Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753184Ab3FXIjt (ORCPT ); Mon, 24 Jun 2013 04:39:49 -0400 Received: from smtp-vbr1.xs4all.nl ([194.109.24.21]:1235 "EHLO smtp-vbr1.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752893Ab3FXIjs (ORCPT ); Mon, 24 Jun 2013 04:39:48 -0400 From: Hans Verkuil To: Prabhakar Lad Subject: Re: [PATCH] media: i2c: tvp514x: add support for asynchronous probing Date: Mon, 24 Jun 2013 10:39:17 +0200 User-Agent: KMail/1.13.7 (Linux/3.10.0-rc6-tschai; KDE/4.9.5; x86_64; ; ) Cc: Guennadi Liakhovetski , Mauro Carvalho Chehab , LMML , Hans Verkuil , Laurent Pinchart , DLOS , LKML , Sakari Ailus References: <1371896189-5475-1-git-send-email-prabhakar.csengg@gmail.com> <201306240911.14288.hverkuil@xs4all.nl> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201306241039.17147.hverkuil@xs4all.nl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3355 Lines: 84 On Mon June 24 2013 10:24:02 Prabhakar Lad wrote: > Hi Hans, > > On Mon, Jun 24, 2013 at 12:41 PM, Hans Verkuil wrote: > > On Sun June 23 2013 17:48:20 Prabhakar Lad wrote: > >> Hi Guennadi, > >> > >> Thanks for the review. > >> > >> On Sun, Jun 23, 2013 at 8:49 PM, Guennadi Liakhovetski > >> wrote: > >> > On Sat, 22 Jun 2013, Prabhakar Lad wrote: > >> > > >> >> From: "Lad, Prabhakar" > >> >> > >> >> Both synchronous and asynchronous tvp514x subdevice probing is supported by > >> >> this patch. > >> >> > >> >> Signed-off-by: Prabhakar Lad > >> >> Cc: Guennadi Liakhovetski > >> >> Cc: Laurent Pinchart > >> >> Cc: Hans Verkuil > >> >> Cc: Sakari Ailus > >> >> Cc: Mauro Carvalho Chehab > >> >> --- > >> >> drivers/media/i2c/tvp514x.c | 22 +++++++++++++++------- > >> >> 1 file changed, 15 insertions(+), 7 deletions(-) > >> >> > >> >> diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c > >> >> index 864eb14..d090caf 100644 > >> >> --- a/drivers/media/i2c/tvp514x.c > >> >> +++ b/drivers/media/i2c/tvp514x.c > >> >> @@ -36,6 +36,7 @@ > >> >> #include > >> >> #include > >> >> > >> >> +#include > >> >> #include > >> >> #include > >> >> #include > >> > > >> > Ok, but this one really does too many things in one patch: > >> > > >> >> @@ -1148,9 +1149,9 @@ tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id) > >> >> /* Register with V4L2 layer as slave device */ > >> >> sd = &decoder->sd; > >> >> v4l2_i2c_subdev_init(sd, client, &tvp514x_ops); > >> >> - strlcpy(sd->name, TVP514X_MODULE_NAME, sizeof(sd->name)); > >> >> > >> >> #if defined(CONFIG_MEDIA_CONTROLLER) > >> >> + strlcpy(sd->name, TVP514X_MODULE_NAME, sizeof(sd->name)); > >> > > >> > This is unrelated > >> > > >> OK I'll split the patch or may be a line in a commit message can do ? > > > > Please split it up in two patches. > > > > Why is sd->name set anyway? And why is it moved under CONFIG_MEDIA_CONTROLLER? > > It's not obvious to me. > > > while using tvp514x subdev with media controller based drivers, when we > enumerate entities (MEDIA_IOC_ENUM_ENTITIES) to get the index id > of the entity we compare the entity name with "tvp514x", So I moved it > under CONFIG_MEDIA_CONTROLLER config. I hope you are OK with > moving this in a separate patch. Sorry, but this approach is wrong. sd->name must be a unique name, so manually setting sd->name will fail if you have two tvp514x devices. There is no reason to override sd->name here, and it is actually a bug. I see that tvp7002 has the same problem (and a bunch of others as well). When trying to find a tvp514x you can just use strstr() in your application. That will work all the time as long as there is only one tvp514x. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/